Lamp holder



FIG. 1 is a perspective view of a lamp holder showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left elevational view thereof;

FIG. 5 is a right elevational view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a perspective view of the lamp holder viewed from another direction.

The broken lines in the drawings illustrate portions of the lamp holder that form no part of the claimed design. 

CLAIM The ornamental design for a lamp holder, as shown and described. 